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(No Model.)' 7

H. VAN I-IOEVENBERGH.

CHEMICAL OR- FAG SIMILE PRINTING TELEGRAPH. No. 316,693.. Patented Apr.28, 1885.

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v UNITED STATES PATENT OFFICE.

HENRY VAN HOEVENBERGH, OF ELIZABETH, NEWV JERSEY, ASSIGNOR TO THEBALTIMORE 85 OHIO TELEGRAPH COMPANY, OF BALTIMORE, MD.

CHEMICAL OR FAC-SIMILE PRINTING-TELEGRAPH.

EPECIPICATION forming part of Letters Patent No. 316,693,dated April 28,1885.

Application filed August 7, 1884.

T0 ctZZ whom, it may concern:

Be it known that I, HENRY VAN HOEVEN- BERGH, a citizen of the UnitedStates, residing in Elizabeth, in the county of Union and State of NewJersey, have invented certain new and useful Improvements in AutomaticTelegraphs, of which the following is a specification.

My invention relates, generally, to the class of telegraphic apparatusemployed for auto matically transmitting messages over a single electricconductor; and it relates especially to that class in which atransmitting-slip is prepared with the characters embodying the messageformed by groups of perforations, the record of which is made at thereceiving-station upon chemically-prepared paper.

The object of the invention is to provide means for causing one terminalof the main line to be electrically connected with a series oftransmitting-points in succession, and to cause the remaining terminalto be simultaneously connected with a series of receiving-styluses insuccession; and,also,to provide means for moving the transmitting andreceiving slips with the proper relative speeds. The invention consistsin employing in connection with two regulated motors, preferably of thegeneral character known as the Lacour motor, a series oftransmitting-points, and a corresponding series of receiving-styluses,which are respectively located at the transmitting and receivingstations. The transmitting-motor is provided with a circuitclosingarm,which is connected with the main line and passes over a series ofcircuit-closing plates in succession. One of these plates is connectedwith an auxiliary battery having the same polarity as the main battery,which is included in the main line for the purpose of effectingimpressions upon the chemicallyprepared paper. The remainingcontactplates are respectively connected with the series oftransmitting-points. The prepared transmitting-slip is moved beneath thecircuitclosing points and over a conducting-surface, which is connectedwith .the earth at a regulated speed by means of a motor. At thereceiving-station there is provided a circuit-closing arm and a seriesof contact-plates corresponding to the similar parts at thetransmitting-station.

(No model.)

One of these contact-plates is connected with the earth, while theremaining plates are respectively connected with the series ofreceiving-styluses. The circuit-clos- 5 5 ing arm which is applied tothis series of contact-plates is also connected with the main line, andit is actuated by the motor at the receiving-station. An arm moving withthe shaft of this motor is applied to an electromagnet which is includedin the circuit of the main line, and the periodic vitalizations of thismagnet serve to maintain the motor in unison with thetransmitting-motor.

Suitable means are provided for advancing the chemically-prepared paperat the proper speed relatively to the transmitting-slip over aconductingsurface which is connected with the earth. So long as themotors move in unison, the circuit of the battery included in the mainline will be completed through the successive transmitting-pointssimultaneously withthe completions through the correspondingreceiving-styluses. At one point in the revolution of the transmittingcircuit-closing 7 5 arm, however, the additional battery will beconnected with the main-line, and at the same moment theground-connection of the main line will be established at thereceiving-station. If, therefore, 'the armature at that moment confrontsits electro-magnet, the motors being in unison, no effect will beproduced.

If, however, the receiving-motor be slightly in advance, theelectro-magnet, by acting upon the armature,will tend to retard thereceiving-motor, and if the receiving-motor be slow the electro-magnetwill tend in like manner to accelerate the movement of the receiving-m0-tor. In this manner the two motors will be maintained in unison. Thetransmitting-slip 0 is prepared with perforations grouped in such amanner as to represent the characters embodying the message. A circuitwill be completed through the main line and' the correspondingreceiving-styluses each time any 5 one of the transmitting-points isplaced in elec trical connection with the main line through one of theseperforations, provided the two motors are in unison, and thattransmittingpoint and the corresponding receiving-stylus will besimultaneously connected with the main line. The impressions willtherefore be formed upon the chemical paper,the positions ofwliich turewill confront the poles of the magnet at correspondto the positions ofthe perforations in the transmitting-slip.

It is designed that for each revolution of the transmittingcircuit-closing arm the transmitting-slip shall be advanced a distanceequal to the width of one perforation, If, for instance,'there be avertical line of perforations in the transmitting-slip, the circuit willbe completed through each of the transmittingpoints in succession beforethat line of perforations has been moved from beneath the points. Theslip will then be advanced, and a succeedingline of perforations will bebrought into position to cause the circuit to be completed through thecorresponding points, when Q the circuit-closing arm connects the samewith the main line through the corresponding contact-plates.

In the accompanying drawings, Figure 1 is a diagram illustrating thegeneral organization of the apparatus employed for carrying out myinvention, and Fig. 2 illustrates certain details in the construction ofthe same.

Referring to the drawings, A and A rep resent two motors. These motorsare designed tobe driven by means of a weight or a spring atapproximately the same rates. For the purpose, however, of renderingtherate of revolution of the two motors entirely synchronous, itis designedto employ an electro-magnet, B, for. modifying the speed of the motor A,to correspond to the movements of the motor A. For this purposeit isdesigned that once in each revolution of the motors the electro-magnet Bshall be vitalized by a current of greater strength than is employed foracting upon the chemically-prepared paper, and that this circuit shalltend to either retard or to accelerate the movements of the motor A asmay be necessary. The shaft a of the motor A carries a circuit-closingarm, b,which is connect ed with the main line. Applied to thiscircuitclosing 'arm are a series of contact-plates, 0, one of which isconnected through a conductor,

'2 including a battery, 0, with the earth at G.

In the main line Lthere isa main battery, 0, havingthe same polarity asthe battery 0'. At the receiving-station the shaft a of the motor Acarries a contact-arm, 12 which is connected in, like manner with themain line L. Applied to this circuit-closing arm is a correspondingseries of contact-plates, 0 one of which is connected with theearth at Gthrough a conductor, lflincluding an artificial resist- Theelectro-magnet B is included in the circuit of the main line, betweenthe circuit-closing arm b and the main line. WVhen, therefore, thecircuit-closing arms I) and]; make simultaneous contact withthe-particula'r plates 0 and 0 which are connected with the earth, theelectro-magnet will be vitalized 1 by a currentdue to both batteries 0and ,0.

Applied to the shafta is-an armature,=e, which passes, oncein eachrevolution of the shaft, before the poles of the electro-magnet B. Theparts are soadjusted that this armathe moment it is vitalized by thecombined action of the batteries Oand 0. Should, however, one motor beslightly in advance of the other, the electro-magnet will be vitalizedwhilethe armaturev is either slightly beyond or before it has reachedthe central point of the electro -magnet, and the motor A will therebybe either retarded or accelerated, as may be necessary to bring it intounison with the transmitting-motor. In this manner the ultimate rate ofrevolution of the two motors, and thus of the two circuit-closingarms,will be rendered synchronous. The remaining series ofoircuit-closingpoints c at the transmitting -station are respectivelyconnected with a series of transmitting-points,

ff f, &c., through conductors 1 2 3, 8:0. Likewise the remainingcontact-plates of the series 0 at the receiving-station are connected,respectively, with a series of receiving-styluse's, h h? if, &c.,through the conductors 8 9.10, &c. The pointsff f &c., rest upon or arepressed toward the transmitting plate or cylinder K, which is ofconducting material, and is connected with the earth at G.

The slip P, which is employed for transmitting the message, consists ofa strip of paper or other suitable non-conducting material, and it isprepared with perforations, as shown at p, grouped in such manner as torepresent the letters and characters embodying the message which it isdesired to transmit. This strip is designed to be moved across the plateK by means of a suitable toothed wheel, m. These wheels carry points a,which enter apertures 3, formed in the respective edges of the strip ofpaper. The wheels m are actuated by means of a wheel, g, which is gearedto the shaft of the motor A, and is thus revolved at the speed requiredfor moving the paper strip beneath the transmitting-points f. At thereceiving-station the series of receiving-styluses h h h &c., rest upona strip of chemicallyprepared paper, P. The paper 1?? is moved over thesurface of a conductingcylinder, K, by means of a feeding-roller, mwhich are actuated by means of the motor A at the proper speedrelatively to the transmitting-strip P. The styluses are successivelyplaced in connectionv with the main line, through the action. of thecircuit-closing arm b and since the moments when they are'so placed incircuit coincide with the moments when the transmitting-points f areconnected with the main line, the records produced by the points uponthe chemically-prepared paper will coincide in position to theperfora-,tions through the instrumentality of which the circuitiis closed at thetransmitting-station, it being understood that the polarity of thebattery 0' is such that currents therefrom act upon the paper in amanner well under-- stood. The resistance r, included in theconductorl", is designed toequalthe resistance offered to the current bythe chemical paper P and the receiving-styluses.

ICO

I claim as my invention- 1. The combination, substantially ashereinbcfore set forth, of two regulated motors and a main line, twocircuit-closing arms, respectively actuated by said motors and connectedwith the respective terminals of said main line, two series ofcontact-plates, respectively applied to said arms, a series oftransmittingpoints, respectively connected with the contact-platesapplied to one of said arms, a series of receiving-Styluses,respectively con nected with contact-plates applied to the other of saidarms, a battery and an electromagnet included in the main line, twoconductors, respectively connecting one of said contact-plates appliedto each motor with the earth, and a battery included in one of saidconductors.

2. The combination, substantially as hereinbefore set forth, of tworegulated motors and a main line, a battery included in said main line,an electro-magnet, also included in said main line, an armature movingwith one of said motors and applied to said electromagnet, a secondbattery, one pole of-which is for placing the same'in connection withsaid main line in succession, of apaper-feeding de vice for causing astrip of paper to be moved beneath said points, two toothed wheelsconstituting a portion of said paper-feeding device, the teeth of whichwheels enter perforations formed in the edge of said paper, and

means for controlling the movements of said 0 paper by the action ofsaid circuit-controller.

In testimony whereof I have hereunto subscribed my name this 26th day ofJune, A. D. 1884:.

HENRY VAN HOEVENBERGH. [L. s.] Witnesses: DANL. XV. EDGEOOMB, CHARLES A.TERRY.

